Locomotive-boiler.



1 e. BROMAN.

LOCOMOTIVE BOILER.-

APPLICATION FILED APR. 24. I916.

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J. G. BROMAN.

LOCOMOUVE BOlLER. me/mow FILED APR. 24. 1916.

Patented Apr. 23,1918.

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JOHN Gr. BROMAN, OF CHICAGO, ILLINOIS.

IlhOGOlVlIOTFVE-IBOILIERu Specification of Letters Patent.

Patented Apr... 23, 191i.

Application filed April 24, 1916. Serial No. 93,149.

'scription ,of the same, reference being had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

This invention relates to an improved type oflocomotive boiler wherein means are provided to insure circulation of the water, thereby utilizing to the fullest extent the heating effect of the boiler, and with other means acting further, due to the course of movement of the water, to skim the surface of impurities and also to prevent entrained water passing with the steam evolved into the steam dome of the boiler.

lt'is an object therefore of this inventlon to construct a locomotive boiler wherein means are provided therein to automatically induce a circulation of water within the boiler by utilization of a thermo-siphon effect, and with means acting further, due to the course of movement of the water, to prevent entrance of entrained water with the steam into the steam dome of the boiler.

llt is also an object of this invention to construct a locomotive boiler provided with balile means mounted therein operating to cause the water in the boiler to moveaccording to a predetermined course of movement due to a thermo-siphon effect as the water is heated, and with means utilizing the course of movement of the water to free the steam evolved therefrom from entrained moisture as it enters the steam dome of the boiler.

It is furthermore an important object of this invention to construct a locomotive boiler of substantially standard design, but equipped on its interior with baffling means so disposed as to cause a thermo-siphon effect of the heated water to set up a predetermined course of movement thereof to obtain the greatest amount of heat from the tubes due to the circulation of the water, and

motive boiler wherein a circulation of water within the boiler is insured, and as well, SGIJilltIlllOllOf the moisture from the steam entering the steam dome, and w1th a sk1mming device to utilize the circulation of the water to skim impurities from the surface thereof for withdrawal from the boiler from time to time,

lhe invention (in apreferred form) is illustrated in the drawings and hereinafter more fully described.

In the drawings:

Figure l is a longitudinal central section taken through a locomotive boiler, with partsomitted and parts shown in elevation, illustrating the same constructed and arranged according to the principles of my invention, M

Fig. 2 is a detail section taken. on line 22 of Fig. 1.

Fig. 3 is y a detail section taken on line 33 of Fig. 1.

Fig. 4 is a view similar. to Fig. 1, of another type of boiler constructed to utilize the principles of my invention. i

Fig. 5 is a detail section taken on line 5-5 of Fig. 1. r

Fig, 6 is a detail section taken on line at of Fig. 4,.

As shown in the drawings:

111 the construction shown in Figs. 1, 2 and 3, the barrel or shell of the boiler, shown as a horizontal locomotive type, is denoted as a whole by the reference numeral 1, and extending longitudinally therethrough are fire tubes 2, connected at their forward ends into a front tube sheet 3, and at their rear ends in a back tube sheet 4, the front tube sheet 3. separating the water compartment in the boiler from the smoke box, denoted by the reference numeral 5, and the back tube sheet 4 forming the front wall of a fire box 6. Mounted on the top of the shell 1, over a large opening provided therein is a steam dome 7, and secured on the inner surface of the shell 1, at one side of said steam dome and curving downwardly therebeneath is a bafile plate 8. Secured upon the rear surface of the front tube sheet 3, and projectingrearwardly within the boiler and from the surface thereof.

Mounter transversely within the shell 1,

its

at the lower portion thereof'and'extending longitudinally and inclining upwardly from the front toward the rear'end; of the. boiler is a long bafile plate 10, and preferably one row of tubes 2, usually providedin the boiler, is omitted, to permit the attachment ofx'saidgbaflie plate 10, in place. As'clearlyshown in Fig. 1, the forward. end of said long inclined baflie plate 10, terminates a short, distanceback of the rear-end of the baflie'or skimming plate 9, and the rear end of said long baffle plate 10, extends to within ashort distance of'the tube sheet 4, of the -fire box. Due to the concavity of the top surfacefof'the skimming'plate 9, the impuriies skim ed from the, surface of the water will be collected on'said plate 9, and may .be blown off from time to time through a valveblow 0a pipe provided for, the purpose.

In the construction illustrated in Figs. 4, 5, and 6, I have shown a slightly different type of'boiler wherein the shell is denoted as fa whole by the reference numeral 11, and is providednear itsforward end with a front tubesheet12, and mounted within the shell and spaced from the walls thereof at the rear end, of theboiler, is a fire box 13, having a front Wall affording a back tube sheet 14, and side walls 15, which extend downwardly spaced from the shell of the boiler, as shown in Fig, 5,. A plurality of fire tubes 16, ex-

upper'end of which is secured substantially tend between the front tube sheet 12, and rear tube sheet; 14, affording communication betweenthe fire box 13,.and the smoke box at the forward end of the boiler. Slightlybelow. the middle portion of said boiler one row of tubes is omitted, and mounted transversely withinthe boiler and inclining upwardly and extending rearwardly therein is a long baffle plate 17, the forward end of which is spaced from the front tube sheet 12, and the rear end of which extends closely adjacent the tube sheet ll. Mounted in the water leg on each sideof: the fire box 13, between the walls 15,

of the: fire box and the shell 11,'of the boiler is a curved plate18, the lower end of which is substantially'in alinement with the rear end of, the inclined baflie. plate 17, and the flushlwith the upper end of the fire box 13.

As in the previous construction described, a'

steam dome 19, is mounted over a relativel largeaperture. 1n the top of the shell 11, and

secured at. one side thereof and'projecting forwardly and curving downwardly beneath saidw steam dome, is, a baffle plate 20.

The operation .is as follows: i'Referrmg first'to the construction illustrated,,1n ,F1gs 1 to 3 inclusive, the hottest portion,- of the, 'he ating means within the f shell 1', is at the rear end of the boiler around fi gessej iateeasea ent r ltheaeisi atendenc the fire box 6,'a'nd; rear end of. the fire tubes for the water in the boiler to rise at the rear end thereof and flow downwardly in a circulating movement at the forward end thereof. Without baflling means, however, such as I- have provided, the swaying and jolting movements of the locomotive and rapid ebullition of steam would prevent any well defined, circulation of water taking place. However, by interposing the relatively long inclined baffle plate 10, in place, and the skimming bathe plate 9, a guiding means is provided which serves to aid the water in taking up a natural circulating movement due to the thermo-siphon effect caused by the difference in temperature of the heating elements at the opposite ends of the boiler. As a conseqence of such circulating movement taking place, the major portion of the steam evolved will occur at the rear end of theboiler, and will tend to move along with the circulating water toward the forward end of the shell, and will be deflected downwardly by the bafiie plate 8, beneath the dome 7, so that water entrained with the steam will be thrown out and the steam will rise upwardly around the edge of the baffle plate 8, into the steam dome 7, in a comparatively dry condition. As the surface water within the boiler flows farther toward the battle or skimmer plate 9, impurities on the surface thereof are skimmed off and will settle within said curved bafiie plate 9, as the water circulates downwardly deflected thereby in a natural thermo-siphon movement.

In the form of device illustrated in Figs. 4, 5, and 6, the general operation is substantially the same, that is, the thermo-siphon effect is aided by the interposition of a long inclined bafiie plate 17, and curved baflle plates 18, in the water legs of the boiler on each side of the fire box 13. As in the construction previously described, a greater amount of steam will be evolved at the rear portion of the boiler substantially above the fire box 13, and will move therewith in the general direction of circulation of the water being deflected downwardly by the baflle plate 20, and thereby freed of entrained moisture to rise in a relatively dry condition into the steam dome 19.

I am aware that the details of construction may be varied through a wide range without departing from the principles of this invention, and I therefore do not purpose limiting the patent granted otherwise than necessitated by the prior art.

I claim as my invention:

In a device of the class described, the combination with a boiler, tubes and front and rear tube plates, of a skimmer and bailie plate secured to the front tube plate adjacent the top of the water line and curved upwardly presenting a curved lower surface, and a halite. plate adjac nt. the. bott m f the boiler inclining downwardly toward the scribed my name in the presence of two suhfront of the boiler and extending from adscribing witnesses. jacent the rear tube plate forwardly to have its forward edge lie in approximately verti- JO BROM 5 cal alinement with the rear edge of the Witnesses:

upper baflle and skimmer plate. CHARLES W. HILLS, JR,

In testimony whereof I have hereunto sub- EARL M. INE.

melee of thlle patent army he obtained for five cente each, by ailflresslny the 1w eemnmoim, I. W 

